This programme is intended as a compendium of modules on procedures in clinical chemistry. At present, the only completed module is one concerning the conduct and interpretation of the glucose tolerance test (GTT). In a GTT, glucose is adminstered to the patient in order to determine how quickly it is cleared from the blood. The test is usually used to test for diabetes, insulin resistance, and sometimes reactive hypoglycemia. The glucose is most often given orally so the common test is technically an oral glucose tolerance test (OGTT).